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[Qemu-arm] [PATCH v3 1/3] target-arm: kvm64: set guest PMUv3 feature bit
From: |
Shannon Zhao |
Subject: |
[Qemu-arm] [PATCH v3 1/3] target-arm: kvm64: set guest PMUv3 feature bit if supported |
Date: |
Mon, 25 Apr 2016 15:11:44 +0800 |
From: Shannon Zhao <address@hidden>
Check if kvm supports guest PMUv3. If so, set the corresponding feature
bit for vcpu.
Signed-off-by: Shannon Zhao <address@hidden>
Reviewed-by: Andrew Jones <address@hidden>
---
target-arm/cpu-qom.h | 2 ++
target-arm/kvm64.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
index 1061c08..93aa6a4 100644
--- a/target-arm/cpu-qom.h
+++ b/target-arm/cpu-qom.h
@@ -105,6 +105,8 @@ typedef struct ARMCPU {
bool powered_off;
/* CPU has security extension */
bool has_el3;
+ /* CPU has PMU (Performance Monitor Unit) */
+ bool has_pmu;
/* CPU has memory protection unit */
bool has_mpu;
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index e8527bf..b364789 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -461,6 +461,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
if (!arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) {
cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_EL1_32BIT;
}
+ if (kvm_irqchip_in_kernel() &&
+ kvm_check_extension(cs->kvm_state, KVM_CAP_ARM_PMU_V3)) {
+ cpu->has_pmu = true;
+ cpu->kvm_init_features[0] |= 1 << KVM_ARM_VCPU_PMU_V3;
+ }
/* Do KVM_ARM_VCPU_INIT ioctl */
ret = kvm_arm_vcpu_init(cs);
--
2.0.4
[Qemu-arm] [PATCH v3 2/3] hw/arm/virt: Add PMU node for virt machine, Shannon Zhao, 2016/04/25